671444231 has 4 divisors (see below), whose sum is σ = 680901264. Its totient is φ = 661987200.

The previous prime is 671444201. The next prime is 671444233. The reversal of 671444231 is 132444176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671444231 is a prime.

It is a super-2 number, since 2×671444231² = 901674710686362722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671444233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4728410 + ... + 4728551.

It is an arithmetic number, because the mean of its divisors is an integer number (170225316).

Almost surely, 2^671444231 is an apocalyptic number.

671444231 is a deficient number, since it is larger than the sum of its proper divisors (9457033).

671444231 is an equidigital number, since it uses as much as digits as its factorization.

671444231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9457032.

The product of its digits is 16128, while the sum is 32.

The square root of 671444231 is about 25912.2409490187. The cubic root of 671444231 is about 875.6622930287.

The spelling of 671444231 in words is "six hundred seventy-one million, four hundred forty-four thousand, two hundred thirty-one".